Weby, good point on the maintenance licensing. Annual maintenance license runs around 25% of the cost of the ERAS license or approx. $15/yr.. I believe the standard would be to purchase at least one year of maintenance up front with the ERAS license. I further believe some customers purchase 36 or 42 months maintenance up front to get a break on the pricing. I am not sure about that but I know I have seen 36/42 mo. ERAS Gold Maintenance pricings.
Again, I have come to think of Trusted Computing as being "hardware security" sans the TC label. We know it's really something more, but for the time being TC is really just a cheaper, easier and better (more secure) way of doing things that are already parts of established spaces. See the Wave brand below.